<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>请使用表格完成下图</title>
    <style>
        td{
            width: 50px;
            height: 50px;
            text-align:center;
        }
    </style>
</head>
<body>
   <div>
    <table border="1px" style="border-collapse: collapse;">
        <tr>
            <td colspan="14">1</td>
            <td rowspan="13">2</td>
        </tr>
        <tr>
            <td rowspan="14">4</td>
            <td colspan="12">5</td>
            <td rowspan="11">6</td>
        
        </tr>
        <tr>
            <td rowspan="11">8</td>
            <td colspan="10">9</td>
            <td rowspan="9">10</td>
        </tr>
        <tr>
            <td rowspan="9">12</td>
            <td colspan="8">13</td>
            <td rowspan="7">14</td>
        </tr>
        <tr>
            <td rowspan="7">16</td>
            <td colspan="6">17</td>
            <td rowspan="5">18</td>
        </tr>
        <tr>
            <td rowspan="5">20</td>
        </tr>
        <tr>
            <td colspan="2">21</td>
            <td rowspan="2">22</td>
            
        </tr>
        <tr>
            <td rowspan="2">24</td>
            <td>25</td>
        </tr>
        <tr>
            <td colspan="2">23</td>
        </tr>
        <tr>
            <td colspan="6">19</td>
        </tr>
        <tr>
            <td colspan="8">15</td>
        </tr>
        <tr>
            <td colspan="10">11</td>
        </tr>
        <tr>
            <td colspan="12">7</td>
        </tr>
        <tr>
            <td colspan="14">3</td>
        </tr>

    </table>
   </div>
</body>
</html>